Geological features and metallogenetic rules of the glauberite deposits of Xiantang in Hengnan county of Hunan

The glauberite ore of Xiantang in Hengnan county has been explorated, and there are 3 ore beds in there.The main ore beds are body I and body II. The ore bodies occurred as beded, bed-like and lens-like. The average thickness of ore beds is 32.17m, and the most thickness is more than 60m, the average grade of Na₂SO₄ is 23.96%~27.16%, the highest grade of Na₂SO₄ is up to 44.73%. The constituents of ore is simple being mainly glauberite, gypsum and anhydrite. The deposits belong to the evaporate bed-like Sulfate-type saline glauberite deposits of the inland lake facies.